#include <iostream>
using namespace std;

int* create(int n) {
    int* a = new int[n];
    for (int i = 0; i < n; i++) {
        cout << "a[" << i << "]"; cin >> a[i];
    }
    return a;
}

void count(int n, int* a) {
    int res = 1;
    for (int i = 0; i < n - 1; i++) {
        if (a[i] != a[i + 1])
            res++;
    }
    cout << res << endl;
}

void y(int n, int* a) {
    int* b = new int[n];
    b[0] = a[0];
    for (int i = 0; i < n - 1; i++) {
        if (a[i + 1] == a[i])
            b[i + 1] = 0;
        else
            b[i + 1] = a[i + 1];
    }
    for (int i = 0; i < n; i++)
        cout << b[i] << " ";
    cout << endl;
}

void alone(int n, int* a) {
    int k = 0;
    int len = 1;
    for (int i = 0; i < n - 1; i++) {
        if (a[i] == a[i + 1])
            len++;
        else {
            if (len == 1)
                k++;
            len = 1;
        }
    }
    cout << k << endl;
}

void v(int n, int* a) {
    int* b = new int[n];
    for (int i = 0; i < n; i++)
        b[i] = 0;
    int len = 1;
    for (int i = 0; i < n - 1; i++) {
        if (a[i] == a[i + 1])
            len++;
        else {
            b[len-1]++;
            len = 1;
        }
    }
    b[len-1]++;
    for (int i = 0; i < n; i++)
        cout << b[i] << " ";
    cout << endl;
}

void u(int n, int* a) {
    int k = 0;
    int* b = new int[n];
    for (int i = 0; i < n; i++)
        b[i] = 0;
    int len = 1;
    for (int i = 0; i < n - 1; i++) {
        if (a[i] == a[i + 1])
            len++;
        else {
            b[k] = len;
            len = 1;
            k++;
        }
    }
    b[k] = len;
    for (int i = 0; i < n; i++)
        cout << b[i] << " ";
    cout << endl;
}

void w(int n, int* a) {
    int* b = new int[n];
    for (int i = 0; i < n; i++)
        b[i] = 0;
    int len = 1;
    for (int i = 0; i < n - 1; i++) {
        if (a[i] == a[i + 1])
            len++;
        else {
            if (len == 1)
                b[i] = a[i];
            len = 1;
        }
    }
    for (int i = 0; i < n; i++)
        cout << b[i] << " ";
    cout << endl;
}

int main() {
    int n;
    cout << "Enter n: "; cin >> n;
    int* a = create(n);

    count(n, a);               // а)
    y(n, a);                   // б)
    v(n, a);                   // в)
    u(n, a);                   // г)
    alone(n, a);               // е)
    w(n, a);                   // ж)
}